topic Cannot find 'Convergence Plot' in Fusion Design, Validate & Document Forum

Cannot find 'Convergence Plot'

Anonymous — Mon, 30 Apr 2018 20:37:54 GMT

Dear all,

Thanks for reading my posts and helping me out, the software is amazing but at the same time it needs a lot of background information and/or basic knowledge which I am trying to get, for example, I have no idea why I cannot access or see 'Convergence Plot' anymore, please check this image, any help would be appreciated :

Re: Cannot find 'Convergence Plot'

Anonymous — Tue, 01 May 2018 16:35:50 GMT

Anyone?

Re: Cannot find 'Convergence Plot'

I_Forge_KC — Tue, 01 May 2018 16:42:38 GMT

Does the solve run have adaptive meshing turned on?

Re: Cannot find 'Convergence Plot'

Anonymous — Tue, 01 May 2018 17:01:33 GMT

Thanks for your reply, no its on ''none'' .

Re: Cannot find 'Convergence Plot'

I_Forge_KC — Tue, 01 May 2018 17:15:50 GMT

Because this is a static linear analysis with no mesh refinement, there is no convergence. There is only a single solve run in this instance. http://help.autodesk.com/view/fusion360/ENU/?guid=GUID-8B876C32-91C7-4E9A-BB30-15F9BD0B229B

Re: Cannot find 'Convergence Plot'

Anonymous — Tue, 01 May 2018 17:28:04 GMT

Thanks for the respond, what I am trying to do is get a plot for no refinement, then do the refinements and compare the result with the 'no refinements' one to see the difference, is there a way to do that? Thank you!

Re: Cannot find 'Convergence Plot'

I_Forge_KC — Tue, 01 May 2018 17:30:54 GMT

So long as your element details are the same, then the first iteration on the convergence plot would be the zero you're looking for.

Re: Cannot find 'Convergence Plot'

Anonymous — Tue, 01 May 2018 17:36:25 GMT

I've found something online which is done in inventor, I am looking for the same thing in fusion 360, maybe I got it wrong or its a different plot in fusion 360? Please check the attached file and let me know what do you think? Thanks.

Re: Cannot find 'Convergence Plot'

I_Forge_KC — Tue, 01 May 2018 18:21:19 GMT

Unfortunately, this is a bit of an apples to oranges comparison. The FEA engine in Inventor is strictly a linear solver that came from a company Autodesk acquired in the mid-2000s called Plassotech. This engine (by default) starts with linear elements and then refines into higher orders (as you've shown). You can then "stack" h refinements (number/size of elements) on top of that. The FEA engine in Fusion is a derivative of the Nastran engine Autodesk acquired a few years ago. While you can certainly specify linear or curved mesh elements, there isn't an automatic escalation from first order to higher. So you have to use your engineering judgment a bit to determine the best element type and then build in your mesh refinements to capture convergence.